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Groups > comp.os.linux.networking > #2839

Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender

From John Hasler <jhasler@newsguy.com>
Newsgroups alt.os.linux, alt.os.linux.ubuntu, comp.os.linux.networking
Subject Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender
Date 2014-03-14 11:07 -0500
Organization Dancing Horse Hill
Message-ID <87ha70g3x4.fsf@thumper.dhh.gt.org> (permalink)
References (11 earlier) <8761nhl7v8.fld@apaflo.com> <gb35i9dfm1d0127bai3rd61en36tl67im0@4ax.com> <87r465j721.fld@apaflo.com> <12egoeyciezgx$.dlg@example1357.net> <87eh24kdih.fld@apaflo.com>

Cross-posted to 3 groups.

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mechanic wrote:
> As to this twisted pair thing, I've no idea what the specs are in
> particular cables but no-one seems to have mentioned the purpose of
> such a feature (if indeed it exists) - presumably to reduce crosstalk
> between pairs, but is that important in Ethernet applications?

Think about two twisted pairs running close together for a long
distance.  The field is not confined between the wires in a pair: a bit
leaks out into the surrounding space.  If there is another pair close by
the field couples a bit of the signal into it.  If the pairs have
exactly the same twist rate this coupled interference will always be in
the same phase and so will add up over a long run and cause problems.
If the twist rates are slightly different the interference will vary in
phase by 180 degrees over a length proportional to the difference in
twist rate and so will average to zero.  The problem gets worse at
higher frequency so Ethernet is more sensitive to it.

This effect was observed (and dealt with) in long 600 ohm open wire
lines more than 100 years ago.
-- 
John Hasler 
jhasler@newsguy.com
Dancing Horse Hill
Elmwood, WI USA

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Thread

How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 00:53 -0800
  Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-08 07:46 -0500
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 10:56 -0800
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 10:58 -0800
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 11:51 -0800
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-08 15:25 -0500
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Scott Hemphill <hemphill@hemphills.net> - 2014-03-08 21:07 -0500
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Scott Hemphill <hemphill@hemphills.net> - 2014-03-08 21:18 -0500
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-08 20:49 -0800
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Mark Lloyd <mark@this.is.not.email.invalid> - 2014-03-09 10:50 -0500
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Bit Twister <BitTwister@mouse-potato.com> - 2014-03-09 02:49 +0000
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-08 20:51 -0800
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-08 23:56 -0900
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-09 09:39 -0700
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-09 11:07 -0800
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-08 23:20 -0900
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-09 07:40 -0700
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-09 21:19 -0400
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-09 09:21 -0700
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-09 10:57 -0800
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-09 16:07 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-09 17:05 -0800
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-10 10:40 -0700
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-10 12:06 -0800
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-10 20:07 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-11 02:36 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-11 19:30 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-11 23:13 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-12 21:30 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-13 04:44 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-13 20:20 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-13 20:30 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-13 22:59 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender mechanic <mechanic@example.net> - 2014-03-14 11:31 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 21:50 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 04:31 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender mechanic <mechanic@example.net> - 2014-03-14 13:45 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 07:26 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender John Hasler <jhasler@newsguy.com> - 2014-03-14 11:07 -0500
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 10:23 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 22:02 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 21:53 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 09:49 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender mechanic <mechanic@example.net> - 2014-03-15 10:45 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 09:57 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-15 12:28 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 14:02 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-15 14:22 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 21:55 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-15 21:25 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 21:54 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 21:58 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-11 19:33 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-11 23:36 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender ceed <ceed@is.indeed.invalid> - 2014-03-12 17:05 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-12 21:48 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-13 04:46 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Eef Hartman <E.J.M.Hartman@tudelft.nl> - 2014-03-12 19:27 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-12 13:32 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-13 19:18 -0700
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 10:59 -0800
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 11:01 -0800
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-08 15:36 -0500
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 19:06 -0800
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-08 20:54 -0800
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-09 08:03 -0400
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-09 07:56 -0700
  Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Big Bad Bob <BigBadBob-at-mrp3-dot-com@testing.local> - 2014-03-08 17:42 -0800

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